Details: This poster is of a WPA ad from World War II. At the top it says Censored and shows a letter. At the bottom it says Let's censor our conversation about the War.

Censorship is the suppression of speech or deletion of communicative material which may be considered objectionable, harmful, sensitive, or inconvenient to the government or media organizations as determined by a censor. Military censorship is the process of keeping military intelligence and tactics confidential and away from the enemy. In wartime, explicit censorship is carried out with the intent of preventing the release of information that might be useful to an enemy. The World War II catchphrase Loose lips sink ships was used as a common justification to exercise official wartime censorship and encourage individual restraint when sharing potentially sensitive information.